<template>
    <div>
       <!-- 面包屑导航 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图 -->
        <el-card>
            <!-- 提示区域 -->
            <el-alert
                title="添加商品信息"
                type="info"
                center
                show-icon
                :closable="false">
            </el-alert>
            <!--  步骤条 -->
            <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>
            <!-- tab栏区域 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
            <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClickked">
                <el-tab-pane label="基本信息" name="0">
                    <el-form-item label="商品名称" prop="goods_name">
                        <el-input v-model="addForm.goods_name"></el-input>
                    </el-form-item>
                    <el-form-item label="商品价格" prop="goods_price">
                        <el-input v-model="addForm.goods_price" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品重量" prop="goods_weight" type="number">
                        <el-input v-model="addForm.goods_weight"></el-input>
                    </el-form-item>
                    <el-form-item label="商品数量" prop="goods_number" type="number">
                        <el-input v-model="addForm.goods_number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品分类" prop="goods_cat">
                    <el-cascader
                        expand-trigger="hover"
                        :options="catelist"
                        :props="cateProps"
                        v-model="addForm.goods_cat"
                        @change="handleChange">
                    </el-cascader>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品参数" name="1">
                    <!-- 渲染表单的Item项 -->
                    <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                        <!-- 复选框组 -->
                        <el-checkbox-group v-model="item.attr_vals">
                            <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i"  border></el-checkbox>
                        </el-checkbox-group>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品属性" name="2">
                    <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                        <el-input v-model="item.attr_vals"></el-input>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品图片" name="3">
                    <!-- action 表示图片要上传到的后台API地址 -->
                    <el-upload
                        :action="uploadURL"
                        :on-preview="handlePreview"
                        :on-remove="handleRemove"
                        list-type="picture"
                        :on-success="handleSuccess">
                        <el-button size="small" type="primary">点击上传</el-button>
                    </el-upload>
                </el-tab-pane>
                <el-tab-pane label="商品内容" name="4">
                    <!-- 富文本编辑器 -->
                    <quill-editor v-model="addForm.goods_introduce">

                    </quill-editor>
                    <!-- 添加商品的按钮 -->
                    <el-button type="primary" class="btnadd" @click="add">添加商品</el-button>
                </el-tab-pane>
                
            </el-tabs>
            </el-form>
        </el-card>
        <!-- 图片预览 -->
        <el-dialog
            title="图片预览"
            :visible.sync="previewVisible"
            width="50%">
            <img :src="previewPath" alt="" class="previewImg">
        </el-dialog>
    </div>
</template>
<script>
import _ from 'lodash'
export default {
    data(){
        return{
            activeIndex:0,
            //添加商品的表单对象
            addForm:{
                goods_name:'',
                goods_price:0,
                goods_weight:0,
                goods_number:0,
                //商品所属的分类数组
                goods_cat:[],
                //图片的数组
                pics:[],
                //商品的详情描述
                goods_introduce:'',
                attrs:[]
            },
            addFormRules:{
                goods_name:[
                    {required:true,message:'请输入商品名称',trigger:'blur'}
                ],
                goods_price:[
                    {required:true,message:'请输入商品价格',trigger:'blur'}
                ],
                goods_weight:[
                    {required:true,message:'请输入商品重量',trigger:'blur'}
                ],
                goods_number:[
                    {required:true,message:'请输入商品数量',trigger:'blur'}
                ],
                goods_cat:[
                    {required:true,message:'请选中商品分类',trigger:'blur'}
                ]
                
            },
            //商品分类列表
            catelist:[],
            cateProps:{
                label:'cat_name',
                value:'cat_id',
                children:'children',
            },
            //动态参数列表数据
            manyTableData:[],
            //静态参数列表数据
            onlyTableData:[],
            //上传图片的URL地址
            uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
            previewPath:'',
            previewVisible:false
        }
    },
    created(){
        this.getCateList()
    },
    methods:{
        //获取所有商品分类数据
        async getCateList(){
            const {data:res}= await this.$http.get('categories')
            if(res.meta.status !==200){
                return this.$message.error('获取商品分类数据失败！')
            }
            this.catelist=res.data
            console.log(this.catelist);
        },
        //级联选择器选中项变化，会触发这个函数
        handleChange(){
            console.log(this.addForm.goods_cat);
            if(this.addForm.goods_cat.length !==3){
                this.addForm.goods_cat=[]
            }
        },
        beforeTabLeave(activeName,oldActiveName){
            // console.log('即将离开的是'+oldActiveName);
            // console.log('即将进入的是'+activeName);
            if(oldActiveName==='0'&& this.addForm.goods_cat.length!==3){
                this.$message.error('请选择商品的分类！')
                return false
            }
        },
        async tabClickked(){
            // console.log(this.activeIndex);
            //证明访问的是动态参数面板
            if(this.activeIndex==='1'){
                // console.log('动态参数面板');
                const {data:res}= await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'many'}})
                if(res.meta.status!==200){
                    return this.$message.error('获取动态参数列表失败！')
                }
                
                res.data.data.forEach(element => {
                    element.attr_vals= element.attr_vals.length===0 ? [] : element.attr_vals.split(' ')
                });
                this.manyTableData=res.data.data
                // console.log(this.manyTableData.data);
            }else if(this.activeIndex==='2'){
                const {data:res}= await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'only'}})
                if(res.meta.status!=200){
                    return this.$message.error('获取静态属性失败！')
                }
                // console.log(res.data);
                this.onlyTableData=res.data.data
            }
        },
        //处理图片预览效果
        handlePreview(file){
            // console.log(file);
            this.previewPath=file.response.data.url
            this.previewVisible=true
        },
        //处理移除图片的操作
        handleRemove(file){
            //1、获取将要删除的图片的临时路径
            const filePath=file.response.data.tmp_path
            //2、从 pics 数组中，找这个图片对应的索引值
            const i= this.addForm.pics.findIndex(x =>x.pic===filePath)
            //3、调用数组的 splic 方法，把图片对象，从 pics 数组移除
            this.addForm.pics.splice(i,1)
            console.log(this.addForm);
        },
        //监听图片上传成功的事件
        handleSuccess(response){
            // console.log(response);
            // 1、拼接得到一个图片信息对象
            const picInfo={pic:response.data.tmp_path}
            // 2、将图片信息对象,push 到pics数组中
            this.addForm.pics.push(picInfo)
            console.log(this.addForm);
        },
        add(){
            this.$refs.addFormRef.validate(async valid => {
                if(!valid){
                    return this.$message.error('请填写必要的表单项！')
                }
                //执行添加的业务逻辑
                //lodash     cloneDeep(obj)
                const form = _.cloneDeep(this.addForm)
                form.goods_cat = form.goods_cat.join(',')
                //处理动态参数
                this.manyTableData.forEach(item=>{
                    const newInfo={attr_id: item.attr_id,attr_value:item.attr_vals.join(' ')}
                    this.addForm.attrs.push(newInfo)
                })
                //处理静态属性
                this.onlyTableData.forEach(item=>{
                    const newInfo={attr_id:item.attr_id,attr_value:item.attr_vals}
                    this.addForm.attrs.push(newInfo)
                })
                form.attrs=this.addForm.attrs
                console.log(form); 
                //发起请求添加商品
                // 商品的名称，必须是唯一的
                const {data:res}=await this.$http.post('goods',form)
                if(res.meta.status!==201){
                    return this.$message.error('添加商品失败!')
                }
                this.$message.success('添加商品成功！')
                this.$router.push('/goods')
            });
        }
    },
    computed:{
        cateId(){
            if(this.addForm.goods_cat.length===3){
                return this.addForm.goods_cat[2]
            }
            return null
        }
    }
}
</script>
<style scoped>
.el-checkbox{
    margin: 0 10px 0 0 !important;
}
.previewImg{
    widows: 100%;
}
</style>